Question

Suppose Ginger deposits $12,000 in cash into her checking account at the Bank of Skidoo. The Bank of Skidoo has no excess reserves and is subject to a 4 percent required reserve ratio.

Answer 1

The question is incomplete since the requirements are missing, but I guess that it deals with the bank's ability to create money.

When you deposit money into a bank account, the bank will then lend most of that money to other clients. This is possible due to the money multiplier = 1 / required reserve rate = 1 / 4% = 25

the total increase in money supply = $12,000 x 25 = $300,000